15.2.3.6-4-311.js (1122B)
1 // Copyright (c) 2012 Ecma International. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 es5id: 15.2.3.6-4-311 6 description: > 7 Object.defineProperty - 'O' is an Arguments object, 'name' is an 8 index named accessor property of 'O' but not defined in 9 [[ParameterMap]] of 'O', test TypeError is thrown when updating 10 the [[Enumerable]] attribute value of 'name' which is not 11 configurable (10.6 [[DefineOwnProperty]] step 4) 12 includes: [propertyHelper.js] 13 ---*/ 14 15 (function() { 16 function getFunc() { 17 return 0; 18 } 19 Object.defineProperty(arguments, "0", { 20 get: getFunc, 21 enumerable: true, 22 configurable: false 23 }); 24 try { 25 Object.defineProperty(arguments, "0", { 26 enumerable: false 27 }); 28 throw new Test262Error("Expected an exception."); 29 } catch (e) { 30 verifyEqualTo(arguments, "0", getFunc()); 31 32 if (!(e instanceof TypeError)) { 33 throw new Test262Error("Expected TypeError, got " + e); 34 } 35 } 36 37 verifyProperty(arguments, "0", { 38 enumerable: true, 39 configurable: false, 40 }); 41 }()); 42 43 reportCompare(0, 0);